Automatic stop for reciprocating devices



Oct. 8, 1929. c. NORTON ET AL AUTOMATIC STOP FOR RECIPROCATING DEVICES Filed June 5. 1925 2 Sheets-Sheet 1 um/M01 C/Ii/oro/Norfon.

John Gusfaflson.

w MUM Oct. 8, 1929. c. NORTON El AL AUTOMATIC STOP FOR RECIPROCATING DEVICES 2 Sheets-Sheet Filed June 5, 1925 Patented Oct. 8, 1929 UNITED STATES PATENT OFFICE CLIFFORD NORTON, OF SOUTH ORANGE, NEW

JERSEY, AND JOHN G. GUSTAFSON, OF

NEW YORK, N. Y., ASSIGNORS TO GRAHAM & NORTON COMPANY, OF NEW YORK,

N. Y., A CORPORATION OF DELAWARE AUTOMATIC STOP FOR RECIPROCATING DEVICES Application filed June 5, 1925. Serial No. 35,244.

Our invention relates to an improved automatic stop device designed to look a recipro eating member to which it is attached against movement in one direction but to allow free movement in the opposite direction and more particularly to devices wherein the reciprocating member carries a pivoted locking dog or latch which co-operates with a fixed stop and is arranged to ride upon said stop in both directions of movement as well as to pass said stop freely on movement in one direction and to lock against said stop on movement in the opposite direction.

Our invention is designed especially to provide a simple and compact construction insuring a change in position of said locking dog or latch on continuation of movement of the supporting member past the locking position, such change of position being effective to permit the latch to pass the locking position free- 1y on the reverse movement of its supporting member. A further object is to insure a change of position of the latch such that its supporting member may move freely in one direction without obstructing the latch until the locking position is attained where the dog will lock against reversal of movement.

For. convenience of description the motion in one direction will be termed the forward movement and the reverse motion or motion in the opposite direction will be termed the backward movement.

This invention consists in the provision of fixed lugs provided as hereinafter described to be engaged by the latch at the desired stages of the forward and backward movements to insure said changes of position of the latch, all as will be hereinafter more particularly described in connection with'the accompanying drawings wherein:

Fig. 1 shows the parts in side elevation in position for free forward movement past the stop.

Fig. 2 shows the position of the same parts as the latch begins to be passed through the throat on the forward movement wherein the actuating lugs or cars are located.

Fig. 3 shows a position of the reciprocating device and pivoted locking dog or latch at which the latch will look upon attempt to move the support in the backward direction.

Fig. 4 shows the said parts after the latchcarryingmember has moved sufficiently in the forward direction to free the latch from the throat and allow it to be moved to position such that it may pass freely through the throat on the backward movement.

Fig. 5 shows the latch in position as it is about to enter the throat on the backward movement. V

Fig. 6 shows the position of the latch as it is about to pass the shoulder of its stop on the backward movement.

Fig. 7 shows the parts at a slightly more advanced stage of the backward movement than that shown in Fig. 6. I

Fig. 8 shows the locking dog or latch about to leave the throat and preparatory to moving down into position such as indicated in Fig. 1.

Fig. 9 is an edge view and partial section through a supporting member of the latch.

In the drawings:

1 indicates a reciprocating member which carries a locking dog or latch indicated at 2. Said dog or latch ispivotally mounted at 3 so that it may take or be moved into the various positions shown in the drawings. The arrow 4 shows the direction of the forward movement or motion herein referred to and arrow 5 in the various figures shows the direction of the backward or reverse movement.

, The stop with which the latch co-operates is shown at 6 and is formed preferably as a shoulder or offset on a fixed member consisting preferably of a solid block or casting 7 adapted to be firmly secured as indicated by screws or other devices to a fixed support. Said stop 6 extends upwardly toward the path described by the latch when moved by said reciprocatingmcmbers1. Said casting 7 is also provided with the downwardly projecting lugs or cars 8 and 9 located above the throat or opening 10 in said block or casting through which the latch passes in the for ward and backward movements.

Said lugs 8 and 9 are located as shown respectively at opposite sides of the vertical line passing through the stop 6.

The use of the lug 8 is to engage an inclined edge of the latch and to force the same down- L L 7 6 1 L- is latch.

wardly towzrds the rail or floor 11 on caststop on one side or" the line of movement of in? a:ter the lat h2leaves the stop 6 in passthe latch and proyectmg towards the path being locked against rethereof and adapted to allow free forward to position t o-.- nt 0 the member carr ing the movement of the latch but to check the backr latch. This action of the h1g6 insures that ward movement from a posit1on at aprede- 7O after the latchhas moved to position over sald termmed stage of said forward movement rail the member 1 will be locked a ainst backand a lug or ear projecting toward the path the vertical side of the SllOulfl or stop of opposite said stop and adapted to be ontowards position such as shown in 4-. so throwing said latch positively into such i pass ireely hrough the thr at without being shoulder or stop on the attempt to reverse ie to the fact that the incline 2. In an automatic locking dog or latch, 12 on the C On tn vard movement the bottom mem or carrying the latch and reciprocating 5 1g. 8 and Wlil pass side or said passageway and pro ecting tobackward movement and may take the posidog or latch and co-operating therewith to positively move the latch downw of the latch from the opposite side of said In the 'forv vro *noven nt the latch passes thereon one to throw the same by positive the back s of the lug or shoulder 6 as freely in backward direction over the stop At this oi? the torward movement'an to throwthe same positively into normal dog or latch against tlie stop. By continuing in dog or latch swung downwardly to posied to be capable of movement on a reciprocate D 1 u ward movement by the locking dog engaging of movement of the latch from the slde theree1 l Jhen the latch reaches the end the rail ll ga ed b 1 the latch on continuance of the for- I e a: 1 3 1 the lug 8 insures its movement d wnwardly ward movement thereof past the stop for that backw d movement the latch may position that it will engage the looking a V n O stopped by he shoulder at 6, this tree movethe movement of the reciprocating member. so ment bei 7 will r1 de treely when it eng es the combination of a fixed member having a the shoulder l3 and the top edge of the shoulthroat or opening adapted to allow passage der or stop 6. oi said lockin do or latch and a movable p c a edge of the h ch finally passes shoulder and the same through said passageway and three the latci may h n be swu fixed shoulders or lugs one located on one position indicated in J. out of the throat on the continuation of the w rd the path of movement of the locking tion shown in l 1;. 1. check the backward movement while the two The function the second lug or others project toward the path of movement backward movement through e1 path and are arranged to engage the latch 0 said lu. with the incline 1% on the latch. after it passes the stop and act respectively ;9 5 through the throat by riding upon the incline action into position such that it may ride indicated in l 2 and finally passes to posiand the other, acting on the latch after it 35 tion where it is sustained upon the rail 11. passes the stop in said backward movement,

atte no to move the sun ort 1 in a backward osition for a re etition of the said movedirection will lGSllllJ in the lOCkHl of the ment oast tne sto mto osition for relock- D .L the forward movement, however, until the 3. In an automatic stop device embodying toe of the dog passes ed the rail and sald afixed member,alock1ng dog or latch mounttion shown in l, backward movement ing member through a throat or passageway re inclined side 12 then ridin said fixed member, a fixed stop projecting and stop 6. The movement toward the line of movement of said recipro- 1 0 v takes places as indicated eating dog or latch from one side of said line The backward movement and co-operating with saidlatch to check til he parts assume the posithe backward movement while allowing free eady for a new forward moveforward movement and a lug projecting into 7 I the throat or passageway towards the line or In the backward movement just described path of movement of the locking dog or latch the function of he lug 9 in connection with from the opposite side of saidline and in the late 1 will be 0 .ily understood by reterposition to be engaged by the latch on forence to S v: ich illustrates the position ward movement beyond the position where 55 of the pa fter the incline on the latch it escapes by the fixed stop and acting there- 611001. cred the lug 9 preparatory to on to force it down into position such that being thrown down into position such that on the reverse movement of the reciprocating it may move TQ'l through the throat on member the dog may ride freely over the repetition of the forward movement. locking shoulder or stop instead of looking to l-Vhat we claim as our invention is against the same.

l. lnan automatic locking dog or latch de- ,4. In an automatic stop device embodymg vice, the combination with reciprocating a locking dog or latch mounted to be capable member a l l tch carried thereby, of a fixed of movement on a reciprocating member into member l g a passageway through which and out of locking position, a fixed stop over has a reciprocating movement, a the locking shoulder of which the latch rides in movement of the reciprocating member both forwardly and backwardly, said stop co-operating with said latch to check the backward movement while allowing free forward movement and a lug projecting towards the path of the latch from the side of said path opposite that on which the fixed stop is located and adapted to engage said latch after it passes this stop on the free backward movement and co-operating therewith to throw it into position preparatory for a repetition of the forward movement.

5. In an automatic stop device, the combination with a reciprocating member and latch mounted thereon, of a fixed member providing a throat through which the latch passes in the backward and forward movements of said member, said member being provided with a locking dog or shoulder engaged by one side of the latch, and two lugs adapted to engage the other side of the latch, and operating to throw the latch downwardly after it passes the locking shoulder or stop in the forward and backward movements respectively.

Signed at New York, in the county of New York and State of New York, this 13 day of April, A. D. 1925.

CLIFFORD NORTON. JOHN G. GUSTAFSON. 

